Cognomen Nepomucen (Nepomucen 
) , all over the world, is a very rare last name. The family name Nepomucen is habitual in Poland, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Brazil. Much less frequently, Nepomucen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nepomucen | Brazil, Malaysia, United States, Poland |
Nepomuceno, Nepomuk, Népomucène, and Ян
| johann nepomucen, graf von lamberg 20 Feb 1764 Laibach (Ljubljana) - 3 Aug 1828 Krems, SI (b. 1764) |
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